YASKAWA Sigma-V Series User Manual page 11

 Wiring
• Be sure to wire correctly and securely.
Failure to observe this caution may result in motor overrun, injury, or malfunction.
• Do not connect a commercial power supply to the U, V, or W terminals for
the servomotor connection.
Failure to observe this caution may result in injury or fire.
• Securely connect the main circuit terminals.
Failure to observe this caution may result in fire.
• Do not bundle or run the main circuit cables for the multi-winding drive unit,
SERVOPACK, or converter together with the I/O signal cables or the
encoder cables in the same duct. Keep all of the main circuit cables sepa-
rated from the I/O signal cables and the encoder cables with a gap of at
least 30 cm.
Failure to do so may result in malfunction.
• Use shielded twisted-pair wires or multi-core shielded twisted-pair wires for
I/O signal cables and encoder cables.
• Use the bus bars that are included with the converter, and connect the P
and N terminals on the SERVOPACK and converter securely.
• The maximum wiring length is 3 m for I/O signal cables, 50 m for servomo-
tor main circuit cables and encoder cables, and 10 m for the control power
supply cables (+24 V and 0 V) of the multi-winding drive unit and converter.
• Do not touch the power terminals while the main circuit's capacitor is dis-
charging, because high voltage may still remain in the multi-winding drive
unit, SERVOPACK, or converter. For details on the charging time of the
main circuit's capacitor, refer to 4.2 Discharging Time of the Main Circuit's
Capacitor.
Before starting to do wiring or inspections, wait for the CHARGE lamps on the
SERVOPACK and converter to turn OFF and then make sure the power has been
completely discharged by using a tester to measure the voltage between the main
circuit DC power terminals (P and N).
CAUTION
xi